mosquitto in bridge

[MaffeMuis]

Hi,

I have 2 spaces (Home and a office).
At home I have 2 Domoticz running (1 raspberry and 1 nas)
At the office I have 1 domoticz running (1 nas)

At the internet I have a server that is running Node Red for all things that can not connect true domoticz and I have my UI running on that

Also my internet server is running a Mosquitto, and on the both nas are running Mossquitto that are connected to the internet server. (for my sonoff switches)

And now is the problem, if I pull a switch, on a server i get the error on the other servers:
2019-09-25 22:42:10.114 MQTT: Topic: domoticz/in, Message: {"command":"switchlight","idx":159,"switchcmd":"On"}
2019-09-25 22:42:10.115 Error: MQTT: unknown idx received! (idx 159)

is there a workaround so I can change the listening from domoticz? IN/OUT?
domoticz01/in
and other server domoticz02/in or something?
Or is it not made for working in brides?